Lithium bromide refrigerating unit with integrated multi-working mode

Abstract

The invention discloses a lithium bromide refrigerating unit with an integrated multi-working mode. The lithium bromide refrigerating unit comprises a high-voltage generator, a low-voltage generator,a high-voltage absorber, a low-pressure absorber, a high-temperature heat exchanger, a low-temperature heat exchanger, a condenser, an evaporator, a PLC control system and a temperature sensor used for detecting the temperature of a heat source. According to the refrigerating unit, different heat exchangers are combined together according to needs by adopting fluid control components such as a solution pump, an electromagnetic valve and the like, the working modes of a two-stage absorption unit working mode, a single-effect absorption unit working mode, a double-effect absorption unit workingmode and the like are integrated; and when the temperature of the heat source ranges from 65 DEG C to 85 DEG C, the system automatically starts the two-stage absorption unit working mode, when the temperature of the heat source is between 85 DEG C and 150 DEG C, the system automatically starts the single-effect absorption unit working mode, when the temperature of the heat source is above 150 DEGC, the system automatically starts the double-effect absorption unit working mode; and no matter how the temperature of the heat source changes, the system is always in the most efficient working state.

Description

technical field [0001] The invention relates to the technical field of absorption refrigeration, in particular to a lithium bromide refrigeration unit with integrated multi-working modes. Background technique [0002] The working principle of the heat pump unit is essentially to transfer heat from different heat transfer media to each other. The temperature of the heat transfer medium that is taken away from the heat decreases and becomes a so-called "refrigerant", and the temperature of the heat transfer medium that absorbs the heat will rise. It becomes a "heat medium" and becomes a heat source for heating the outside world. Therefore, according to whether the output heat transfer medium is "refrigerant" or "heating medium", the absorption heat pump unit can achieve the dual purposes of cooling and heating. Absorption heat pump units with refrigeration as the main purpose are also called absorption chillers. At present, the widely used absorption chillers mainly use lithi...

AI Technical Summary

Problems solved by technology

[0004] (1) When the actual heat source temperature is lower than the design value, the cooling performance of the unit will drop significantly. If the actual heat source temperature is too much lower than the design value, the unit will lose its cooling function

[0005] (2) When the actual heat source temperature is higher than the design value, although the cooling performance of the unit will not decrease, it will not increase, wasting precious high-grade heat sources, and failing to achieve the design purpose of high temperature and high efficiency

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